A horizontal bar chart displays the populations of ten countries in the year 2000. Using React with D3 v5, the visualization loads CSV data and maps the Population values to bar widths via a linear scale, while a band scale positions country names along the vertical axis. The `AxisBottom` and `AxisLeft` components render tick lines and labels, and the `Marks` component draws SVG rectangles with tooltips that format population values using d3’s `format` function.